1. Product Overview
The VODOOL 400A Intelligent Pulse Repair Charger is a versatile and fully automatic battery charger designed for 12V/24V lead-acid batteries. It features an intelligent five-stage, five-level pulse repair system for battery maintenance and activation. The charger provides real-time display of voltage, current, and battery capacity, ensuring a clear understanding of the charging process.

This charger is compatible with various lead-acid battery types, including dry cell, water battery, maintenance-free batteries, EFB, AGM flat panel batteries, AGM winding batteries, and gel batteries. It is not suitable for charging lithium batteries.
2. Safety & Warnings
Important Safety Information
- Keep the device and its cord out of reach of children under 3 years old.
- Keep away from children unless supervised by an adult.
- Do not use this product for purposes other than its intended use.
- Inspect the product before each use; do not use if damaged.
- Follow installation and operation guidelines to avoid injury.
- Do not expose to water or moisture.
- Handle with care to avoid cuts or injuries.
California Proposition 65 Warning
⚠ WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
3. Technical Specifications
| Feature | Specification |
|---|---|
| Product Name | Electrical Equipment |
| Model | 400A Intelligent Pulse Repair Charger |
| Brand | VODOOL |
| Material | Metal |
| Product Current | 400A |
| Product Power | 220W |
| Rated Current | 10A |
| Voltage Range | 110V-240V (wide voltage) |
| Output Current | 12V-12A / 24V-9A |
| Charging Range | Suitable for 12V/24V batteries (6AH-200AH) |
| Applicable Battery Types | Lead-acid batteries (EFB, AGM flat panel, AGM winding, gel, WET, dry cell, water battery, maintenance-free) |
| Incompatible Battery Types | Lithium batteries (strictly forbidden) |
| Item Length | 175 mm (6.89 in) |
| Item Width | 160 mm (6.30 in) |
| Item Height | 60 mm (3.54 in) |
| Item Weight | 800 g |
| Power Cord Length | 120 CM |
| Clamp Length | 60 CM |

Note: Due to different monitor settings and lighting conditions, the actual color of the item may vary slightly from the pictures. Please allow 1-2cm measuring deviation due to manual measurement.
4. Setup Instructions
4.1 Power Off Confirmation
- Before connecting the charger, ensure the vehicle's battery is disconnected. Remove the negative cable of the battery first.
- Use a multimeter to measure the installation voltage of the device in DC mode. The voltage should be less than 0.5V.
4.2 Line Pretreatment (if necessary)
If the existing wire harness is damaged, cut off the damaged section. Use cold-pressed terminals (model: T2-4, matching wire diameter) to crimp new wires. Fully cover the connection with heat shrink tubing (wall thickness ≥ 0.8mm after shrinkage) to ensure insulation and protection.
4.3 Physical Fixation and Wiring
- Secure the charger body using M5 stainless steel screws in a stable location.
- Route the wiring harness along the original direction of the vehicle, maintaining a spacing of ≤ 15cm.
- Ensure the wiring avoids the exhaust pipe, transmission shaft, and any movable hinge areas to prevent damage or interference.



5. Operating Instructions
5.1 Connecting the Charger
- Ensure the charger's power plug matches your region (EU or US).
- Connect the red alligator clip to the positive (+) terminal of the battery.
- Connect the black alligator clip to the negative (-) terminal of the battery.
- Plug the charger into a suitable power outlet (110V-240V).

5.2 Automatic Charging Process
The charger features an intelligent digital display that automatically identifies battery capacity, current, and voltage. It supports a simple one-button start. The charger will automatically adjust the current and recognize whether it's a 12V or 24V battery.

The five-stage, five-level pulse intelligence repair system ensures the battery is protected from damage during charging, extending its lifespan. The charger will automatically shut off once the battery is fully charged.

5.3 Manual Charging Mode
For continuous charging or to further activate a deeply discharged battery, the charger offers a manual mode. In this mode, the charger will continue to charge beyond the automatic shutoff point. Monitor the battery closely during manual charging to prevent overcharging.
5.4 Function Verification (Post-Installation)
After connecting the battery and charger, restore the negative terminal of the battery. Test various load items one by one to ensure proper function. For example:
- Turn on the headlight to test the sound of the relay closing.
- Insert a USB device to test the output voltage of 5.0 ± 0.2V.
- Record that no new fault codes are added to the OBD-II system.
6. Maintenance
6.1 Battery Repair and Activation
The charger's advanced repair technology, including its five-stage, five-level pulse intelligence repair system, can address issues like insufficient power, low voltage, and high internal resistance in lead-acid batteries. Regular use of this feature can help maintain battery health and extend its lifespan.
6.2 Cleaning and Storage
- Ensure the charger is unplugged and cooled before cleaning.
- Wipe the exterior with a dry, soft cloth. Do not use harsh chemicals or abrasive cleaners.
- Store the charger in a dry, cool place, away from direct sunlight and moisture.
- Keep the power cord and clamps neatly coiled to prevent damage.

7. Troubleshooting
The Intelligent Pulse Repair Charger is designed with six smart protections to prevent common issues:
- Reverse Connection Protection: Prevents damage if battery clamps are connected incorrectly.
- Short Circuit Protection: Automatically shuts off if a short circuit is detected.
- Over-Voltage Protection: Safeguards against excessive voltage input.
- Over-Current Protection: Prevents damage from excessive current draw.
- Overheating Protection: The high-power cooling fan helps dissipate heat, and the charger will protect itself from overheating.
- Low Voltage Protection: Ensures safe operation even with low battery voltage.
If the charger is not functioning as expected, check the following:
- Ensure the power cord is securely plugged into a working outlet.
- Verify that the alligator clips are correctly and firmly attached to the battery terminals (red to positive, black to negative).
- Check the LED display for any error codes or unusual readings.
- Confirm that the battery type is compatible with the charger (not a lithium battery).
- If the issue persists, refer to the full user manual (PDF) for more detailed troubleshooting steps.
8. User Tips
- For optimal battery health, consider using the pulse repair function periodically, especially for older or underperforming batteries.
- While the automatic mode is convenient, the manual charging mode can be useful for deeply discharged batteries that need a longer, more sustained charge to reactivate. Always monitor the battery during manual charging.
- Ensure good ventilation around the charger during operation to aid the cooling fan and prevent heat buildup.
9. Warranty and Support
For detailed warranty information, specific terms, and comprehensive support, please refer to the official user manual provided in PDF format. This document contains additional instructions and legal information.
You can access the full user manual PDF here.
For further assistance or inquiries, please contact the seller or manufacturer directly.





